Home button not working at all after screen replacement.

I just replaced the battery and screen. Everything went perfectly fine except for losing two of the screws. Everything works fine except the home button. It’s not that the touch-id won’t work, the button itself doesn’t work at all.

I put the old screen back on and it doesn’t work with the old screen either. I checked for damage and I see no damage (no rips, tears, etc.)

I’ve done this exact work on 3 other phones in the past year and this time was the easiest, yet the only time something didn’t work when I put back together.

Now I’ve got to decide if I want to buy another part (home button) and hope it works… I’ve already spent 130 bucks trying to get this phone nice again to avoid upgrading for 1000… I obviously can’t return the parts since they’re not the problem.

What is wrong, what should I do.